| ตัวอย่าง Example |
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<script runat="server">
Sub Page_Load
If Not Page.IsPostBack then
Dim MyTown=New SortedList
MyTown.Add("S","Samutprakran")
MyTown.Add("B","Bangkok")
MyTown.Add("C","Chengmai")
MyTown.Add("P","Puket")
MyTown.Add("Y","Yala")
rb.DataSource=MyTown
rb.DataValueField="Key"
rb.DataTextField="Value"
rb.DataBind()
End If
End Sub
Sub displayMessage(s as Object,e As EventArgs)
lbl1.text="Your favorite country is: " & rb.SelectedItem.Text
End Sub
</script>
<html>
<body>
<form runat="server">
<asp:DropDownList id="rb" runat="server"
AutoPostBack="True" onSelectedIndexChanged="displayMessage" />
<p><asp:label id="lbl1" runat="server" /></p>
</form>
</body>
</html>
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